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3-5/8% 30-YEAR TREASURY INFLATION-PROTECTED SECURITIES (TIPS) Due April 15, 2028

Ref CPI and Index Ratios for September 2008

    Contact: Office of Financing            202-504-3550
    DESCRIPTION:                            TIPS of April 2028
    CUSIP NUMBER:                           912810FD5
    DATED DATE:                             April 15, 1998
    ORIGINAL ISSUE DATE:                    April 15, 1998
    ADDITIONAL ISSUE DATE:                  July 15, 1998
    MATURITY DATE:                          April 15, 2028
    Ref CPI on DATED DATE:                  161.74000
    TABLE FOR MONTH OF:                     September 2008
    NUMBER OF DAYS IN MONTH:                30

    CPI-U (NSA) May 2008                    216.632
    CPI-U (NSA) June 2008                   218.815
    CPI-U (NSA) July 2008                   219.964

    Month   Calendar Day   Year    Ref CPI      Index Ratio

    September      1       2008    218.81500       1.35288
    September      2       2008    218.85330       1.35312
    September      3       2008    218.89160       1.35335
    September      4       2008    218.92990       1.35359
    September      5       2008    218.96820       1.35383
    September      6       2008    219.00650       1.35407
    September      7       2008    219.04480       1.35430
    September      8       2008    219.08310       1.35454
    September      9       2008    219.12140       1.35478
    September      10      2008    219.15970       1.35501
    September      11      2008    219.19800       1.35525
    September      12      2008    219.23630       1.35549
    September      13      2008    219.27460       1.35572
    September      14      2008    219.31290       1.35596
    September      15      2008    219.35120       1.35620
    September      16      2008    219.38950       1.35643
    September      17      2008    219.42780       1.35667
    September      18      2008    219.46610       1.35691
    September      19      2008    219.50440       1.35714
    September      20      2008    219.54270       1.35738
    September      21      2008    219.58100       1.35762
    September      22      2008    219.61930       1.35785
    September      23      2008    219.65760       1.35809
    September      24      2008    219.69590       1.35833
    September      25      2008    219.73420       1.35856
    September      26      2008    219.77250       1.35880
    September      27      2008    219.81080       1.35904
    September      28      2008    219.84910       1.35927
    September      29      2008    219.88740       1.35951
    September      30      2008    219.92570       1.35975